Dead air pump

Dead air pump - S70

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M - 04 May 2006 05:09 GMT

I haven't been treating my car very well.

After the OBD gave a reading that said my SAS valve had problems, I put
the problem aside since I didn't think it was a big deal. Later, my air
pump started to squeal when it started. That was only heard when starting
the car or sometimes when idling. Still didn't bother me.

Then, for some reason the check engine light turned itself off. That
seemed odd. Now, it is back on again, and I never hear my air pump. Can I
assume that it's just given out, maybe with seized bearings.

I'm ready to replace the SAS valve and air pump. Are these pretty easily
accessable and replacable by an average joe? I have read the instructions
on Volvospeed over and over again, and it seems doable for me.

Lastly, what are signs of a dead relay? I'd like to know whether I should
order a new one with all the other parts.

Mike

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Mike F - 05 May 2006 13:35 GMT

> I haven't been treating my car very well.
>
[quoted text clipped - 15 lines]
>
> Mike

The only tough part of the job is one of the bolts on the SAS valve
doesn't give you much room. (That and coughing up the money for the
parts.)

If the relay is dead, then the pump won't work, it's that simple. Keep
in mind that your pump relay is in the box under the hood marked "Main
Fuses", not like the pictures you see of the one on an 850. It's one of
the yellow ones, (on my car anyway), although I forget which one. (The
other yellow one does the trans computer and they're the same relay, so
if you swap them, it should be obvious if there's a problem.)

Signature

Mike F.
Thornhill (near Toronto), Ont.

Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)

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M - 06 May 2006 01:34 GMT

Is there any way to test the relay to see if it still works?

> > I haven't been treating my car very well.
> >
[quoted text clipped - 26 lines]
> other yellow one does the trans computer and they're the same relay, so
> if you swap them, it should be obvious if there's a problem.)

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User - 07 May 2006 00:07 GMT

> Is there any way to test the relay to see if it still works?
>
[quoted text clipped - 28 lines]
> > other yellow one does the trans computer and they're the same relay, so
> > if you swap them, it should be obvious if there's a problem.)

An interesting read through about repairing the air pump:

http://www.matthewsvolvosite.com/air_pump_replacement_850.php

Bob

Signature

The goal when driving is to miss the maximum number of objects.

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M - 07 May 2006 00:15 GMT

Actually, that's the route I plan on going. I bought a used air pump on
eBay for $47 including shipping.

> An interesting read through about repairing the air pump:
>
> http://www.matthewsvolvosite.com/air_pump_replacement_850.php
>
> Bob

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Mike F - 08 May 2006 15:27 GMT

> > If the relay is dead, then the pump won't work, it's that simple. Keep
> > in mind that your pump relay is in the box under the hood marked "Main
> > Fuses", not like the pictures you see of the one on an 850. It's one of
> > the yellow ones, (on my car anyway), although I forget which one. (The
> > other yellow one does the trans computer and they're the same relay, so
> > if you swap them, it should be obvious if there's a problem.)

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mikechiu@overlunch.com - 08 May 2006 20:45 GMT

>From what you wrote, I can assume that if the relay is dead, then the

air pump will definitely not work. In my head, having a dead air pump
doesn't imply that the relay is dead. That's why I was asking if there
was a way to test if the relay works w/o actually buying a new one yet.

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Mike F - 09 May 2006 14:39 GMT

> >From what you wrote, I can assume that if the relay is dead, then the
> air pump will definitely not work. In my head, having a dead air pump
> doesn't imply that the relay is dead. That's why I was asking if there
> was a way to test if the relay works w/o actually buying a new one yet.

Your car has 2 identical relays, one powers the air pump, the other
powers the electrics / electronics for the transmission. They are side
by side in the "MAIN FUSES" box. They have 4 pins, 2 somewhat larger
than the other 2. I assume your transmission is working fine. Swap the
relays. If your transmission is still working fine, then both relays
are OK. If your transmission is not working fine, then the air pump
relay is bad.

Signature

Mike F.
Thornhill (near Toronto), Ont.

Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)

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M - 10 May 2006 06:03 GMT

I was looking online for a new relay, and I noticed that most ads
mentioned their dual usage. However, I didn't think about swapping them
around as a test. Thanks for the good advice ... again.

The relay is not bad at around $55. It's certainly cheaper than the $300
for the air pump. I sure hope my used VW air pump swap works.

You're a real asset to this newsgroup and especially to S70 owners!
Thanks,
Mike

> > >From what you wrote, I can assume that if the relay is dead, then the
> > air pump will definitely not work. In my head, having a dead air pump
[quoted text clipped - 8 lines]
> are OK. If your transmission is not working fine, then the air pump
> relay is bad.

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